Harness stop motion for looms



WH [miami Jul 26 1927. 1,636,927 y G. RHEAULT I HARNESS STOP MOTION FOR L'OOMSz l Filed Deo. 51, 192e 2 Sheets sht 1 65:3'. fill ,mf; 6 5 {mf/",111 y wtfzdg-d [Iii/[1],

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I /NVENTOR BY Y, ,f' I

ATTGRNEY July 26, 1927.

G. RHEULT HARNESS s'roP MOTION Fon Loous Filed Dec. 31. 1926- l2 sheets-sheet 2 ATTORNEY v good practical form thereof.

hunted July ze, 1927.

UNITED VSTATES GEORGE BHEAQULT, 0l' LOWlLIi, MASSACHUSETTS, ASSIGNOB 'ro Dann consona- TION, Ol HOPEDALE, IABSACHUSETTS, A CORPORATION 0l um wiss STOP IOTION IOR MOIS.

Panam ma member s1, me; man n. man.

This invention relates to loom sto ping mechanism and is more particularly irect'v ed to means for stopping the loom on the occurrence of an'abnormal condition in the harness mechanism. 4

During weaving the harness frames are raised and lowered through a train of mechanism associated with the harness frames by means of harness'connectors, and should an abnormal condition occur in the harness mechanism, such, for instance, as the breakage or undue slackness of a .harness connector, injury is liablerto occur to the warp threads and imperfect clot-h be produced., Attempts have heretofore been made to remedy this condition but the compllcations introduced by the trains of mechanism employed have rendered the adoption of such mechanisms as have heretofore been proposed objectionable.

One of the objects of the present invention is to provide a harness stop mechanism which will be simplevin construction, eil'ective in operation in stopping the loom upon the occurrence of a fault in the harness mechanism, and which will at the same time indicate to the weaver the cause of loom stoppage. i r

The invention and new combination of parts and novel features thereof will best be made clear from the following descrip tion and the accompanying drawings of one In the drawings:

Fig. 1 is a perspective view with some of the parts broken away, showing a loom provided with the present invention;

Fig. 2 is an enlarged perspective detail showing more particularly the transversely movable detector bars and the stopping nger in its normal position during weav- Fig. 3 is a side elevation of the stopping mechanism looking from the rear of the loom and showing the stopping linger in its loom stopping position;

Fig. 4 is a cro s-section on the line 4-4 of Fig. 3; A

Fig. 5 is a side elevation showing the train of mechanism for knocking oil' the shipper when the transversely movable detectors, or one of them, is arrested; and

Fig. 6 `is a diagrammatic view showing the. stop linger actuatorfand harness conne@- tors by fulllines in their normal condition and by dotted lines showing the actuator as having been depressed Vby a too slack harness connector.

In accordance with the present invention, the means for effecting loom stoppage upon the occurrence of an abnormal condition in theharness connectors is associated with a warp stop mechanism wherein transversely movable toothed detector bars are employed in connection with meansl for effecting loom stoppage when a fault occurs iny a warp thread. The shedding mechanism for opening the warp for the insertion of a weft thread may be of any usual or desired type and the number of harnesses may be varied in accordance with the character of cloth being woven, the essentials in this respect being that should an abnormal 'condition occur in any of the harness connectors, the loom will be brought to. rest to enable the loom attendant to correct the fault.

The loom frame'l may be of usual construction and as shown is provided withrisers 2, one at each side of the loom frame, which support the cross-beam or arch` 3. Pivotally mounted on the loom frame are the levers 4 constituting a part of a wellknown type of shedding mechanism, and each of the levers 4 is operatively associat, ed with a harness frame by means of connectors 5 which in the resent/instance are shown as secured to roc er -arms 6. To each upper portion of the rocker arm 6 is ysecured a vharness connector 7 which asses over guide sheaves or pulleys 8 and eads downwardly to one of the harness frames 9. Similarly, the lower end portion of4 each rocker 6 has secured thereto a' harness connector-10 whichpasses over a sheave or pulley 11 supporte by the arch 3 and is secured to one ofthe harness frames 9. -The levers 4 are. herein shown as of the bellcrank type, although they may be of any usual form of harness lever operating means, and the outwardly dprojecting arms 12 of each lever have secure connector 13 leading downwardly, and passing around guide pulleys or sheaves 14 at the lower portion of the loom frame. The connectors 13 lead from the pulleys or sheaves 14 horizontally, as indicated in Fig. 1, and pass around suitable guide sheaves or pulleys 15 at the lower part of the loom! thereto a harness `frame, then' upwardl as indicated inFig.

l, and the' up er en of each connector-1s secured to the ower end Vof a harness frame 9, the effect being that when the levers 4-are actuated by any of the well-known forms of shedding'mechanism, the harnesses 9 will be raised or lowered to form the shed. There is nothing new in thisfeature, and the shedding mechanism as well as the means for actuating the harness frames may be varied indefinitely, as may also be the number of harness frames employed.

v The warp threads a pass from the warp beam 16 over the whip roll 17 and from there pass into cont-rol of the harness frames, with the result that as the harness frames are raisedl or lowered by the' shedding mechanism the Warp threads will be appropriately moved to form the shed, and between thewhip roll 17 and the harness frames is VAthe warp stop motion.

The warp stop mechanism comprises the side brackets 18, one at each side of the loom, between which extend the transverse toothed detectors. In the present instance of the invention, each side frame 18 has secured thereto a fixed detector bar 19 having a series of teeth 20, and associated with each of the fixed detector barsv 19 is a transversely movable detector bar 21 which is likewise provided with a series of teeth 22, as indicated in Figs.l2, 3 and 4. The fixed detector bars 19 are provided with the slots or openings 23 through which extend the pins 24 which are connected to the linksr25 associated with means for imparting to the movable detector bars their transverse niotion. In the present instance of the invention, theineans for imparting transverse movement to the movable detector bars may be substantially similar to the construction shown and described in the patent to Harry A. Davis and Arthur S.

Johnson, No. 1,538,625, dated May 19, 1925,

except as modified in the respects hereinafter noted.

Mounted for rockingmovement onone of the side frames or supports 18 is a rocker 26 to which rocking movement is imparted by an arm 27 connected at yits free end portion to a rod 28 which extends downwardlyand is actuated from the lower or cam shaft 29, the construction being such that as the cam shaft is actuated, the rocker 26 will have imparted thereto the desired roc-king movement. Extending u wardly from the rocker 26` are the yielding ngers 30, each of which is pivotally connected at 31 to a link 25 associated with the transversely movable toothed detector. The fingers 30 and their association with the rocker' 26 may be substantially the same as more fully described in the Davis and Johnson patent, hereinbe- 'fore mentioned. the lconstruction being such that as the rocker 26 is given its rockingmoveinent. the associated lingers 30 will im- Maase? art to the transversely movable detector.

ars their transverse movements,

Pivotally mounted on the rocker 26 at 32 are a seriesof actuators 33, one for each finger30, and such actuators rest upon the cross-bar 34 carried by arms 35 pivotally mounted at 36 to the rocker. Each of the actuators 33 is connected at its 4inner end, as at 37, to a finger 30, with the result that should any one' of the fingers 30 be arrested in its movement with the rocker, it will impart to its associated actuator 33 movement to cause the cross-bar'34 tobe depressed. Extending downwardly from the bar 34 is the'presser 38 which bears upon the end of a flexible member 39. The fiexible member 39 is enclosed within a flexible sheath 40 and its end remote from the warp stop mechanism bears upon the plunger` 41 adapted to lift the dog 42 into the path of a bunter 43 carried by thehiy 44. The dog 42 is mounted :for backward yielding movement under the action ofthe bunter 43, as more fully described in the Davis and Johnson patent,-

fully described in the Davis and Johnson patent. v

Extending between the side supports or brackets 18 of the warp stop mechanism is the rod 47 which may if desired be constituted as one of the warp supports, and mounted uponv the rod 47 is the stop finger 48. In the present instance the stop linger 48 is shown as of light wire construction and has ,coils 49 which embrace the rod 47 between the collars 50 secured to the rod 47, so that the stop finger may have rocking movement upon the rod 47.

The stop 'linger 48 is thus associated with the toothed detector bars in position such that should the stop finger be lowered from its normal position it will engage between the teeth of the toothed detector bars and arrest movement of the movable detector bar, to thereby effect looml stoppage. The stop finger 48. is normally held in its upper or inoperative' position by suitable means with permissive movement into engagement with the teeth ofthe detector bars. In the present instance of the invention, the stop linger 48 has an arm 51 extending outwardly from the rod 47. and is provided with a weight 52 which serves as a good practical forni of means for normally holding the stop finger in its upper or inoperative position with respect to the teeth ofthe detector bars.

From the construction thus nlfar described it will be obvious'that the stop finger 48 normally projects upwardly above the toothed detector bars, andvin such position serves as a signal or indicator to-indicate to the loom appear.

1,ese,ba7 .a

attendant that the harness connectors are in normal working condition, as will presently The stop portion provided with an eye 53-to whichl is secured a downwardly extending member 54 connected at its lower end to an actuator 55 which extends under the harness connectors 1 3, Fig. 1, and is pivotally mounted to the loom frame, as at 56, the constructlon being such that should any one of the harness connectors above the actuator become slack and .consequently rest upon the actuator, it will cause the stop finger 48 to 'be moved downwardly into locking engagement with the teeth of the toothed detector bars, and, perforce, effect loom stoppage. It is convenient and preferred to carry the stop finger 48 above the entire series of toothed detector bars, so that it may engage with the teeth of all of the bars when the stop linger is moved downwardly by too much slackness in a harness connector, but the invention is not necessarily limited to this detail because it is quite sufficient if the detector bar in its downward movement by an abnormally conditioned harness connector should engage one of .the series of detector bars and thereby stop the movement of the movable detector bar. By carrying the detector finger across the entire series of tootheddetector bars, it more obviously indicates to the loom attendant thek cause of loom stoppage by the fact that thestop finger has been moved downwardly.

Associated with the toothed detector bars are a serie's of drop wires, indicated at 57, which are normally supported by the warp threads during weaving, and should a war thread become abnormally conditioned), either by breakage or too much slackness therein, the associated drop wire will engage the toothed detector bars` and arrest the movement of the transversely'movable bar` to effect loom stoppage.

Should any of the harness connectors between the shedding mechanism and harness frames become abnormally conditioned, as by breakage or too much slackness in any part thereof, the portion of the harness connector extending over the actuator. 55 will drop and rest upon the actuator, thereby moving the stop finger from its normal position into engagement with the toothed detector bars and effect loom stoppage, and the f'act that the stop finger has been moved from its normal position at once indicates to the loom attendant the cause of loom stopf page, thereby enabling him at once to remedy the fault in the harness connectors. Should a warp thread break or become -too slack, and the loom be stopped, the stop finger will still maintain its upper position, thereby indicating to the loom attendant that the harness connectors are in normal finger 48 as shown has its end.

working condition but that the loom has been stopped from a thread fault.

In positioning the stop finger for cooperation with the toothed detectorbars, it should be located with. respect tothe teeth in the fixed detectorbar, so'that when the 'stop finger is moved into loom stopping position, it will enter the recess between the teeth of tor bar by locking the two barstoge'ther.

The present invention provides a simple, effective, and readily observable means for indicating the cause of loom y"stoppage when. any one of the harness connectors' becomes too slack for roperV weaving purposes.

What is claimed is:

- the fixed detector bar and' arrest movement of the transversely movable toothed detec- 1. In a harness stop mechanism for looms,

the 'combination of the shedding mechanism including harness connectors, a" toothed "de-f' lloom stoppage when the lengthwise movable 'detector member'V is arrested in its detecting movement, and means for causing vthe stop member to engage a tooth of the detector member and arrest its lengthwise movement when an abnormal condition occurs in the harness mechanism.

2. Ina harness sto mechanism for looms, the combination of s edding mechanism i'ncluding harness connectors, a detector hav'- ing teeth, means for imparting lengthwise detecting movements to the detector, means for effecting loom stoppage when the lengthwise movement of the detector is arrested, a stop finger, means normally acting to hold the stop finger from engagement with the teeth of the detector, and means actuated onthe occurrence of an abnormal condition in the harness mechanism for moving the stop finger into engagement with the toothed detector to arrest its lengthwise movement and',-

efect loom stoppage.

3. In a harness sto mechanism forlooms, the combination of s edding mechanism including harness connectors, a detectorhaving teeth, means for impart detecting movements to the detector in the direction of its length, a stop finger mounted for movement into engagement with the toothed detector lto arrest its endwise detecting movement and normally held from such engagement until the occurrence Vof anl abnormal conditionm a harness connector, and means operated by the abnormally conditioned connector for 4 drop wires, a stop finger adapted to-engage tuated on the occurrence of an abnormal condition in a harness connector for moving the stop linger into lockingrelation with the toothedba'rs. 1

5.1In aloomhavin harness frames and -harnessconnectors,- t e combination .of a

warp stop mechanism comprising v4two relatively llengthwise movable toothed bars and` drop wires, astop tin er extending transl i versely of the toothed ars in normal posimovement and tion to permit their relative lengthwise ada ted to engage the toothed bars and loc lengthwise movement, means for stopping the loom whenvthe toothed bars arelocked together, means normally acting to hold the l stopnger out of locking engagement with' warp stop mechanism comprising relatively lengthwise movable detecting members having teeth, a series of drop devices normally supported by the warp threads and adapted to engage the teeth of the detectingmembers and lock the detecting members together onv the -occurrence of a warp fault, another drop device adapted to engage the teeth of the detecting members and unsupported' by the warp threads but normally held out of locking engagement with the teeth of the lengthwise movable detecting members, means for effecting loom stoppage when the detecting members are locked together, and means operative on the occurrenceof Aan abnormal condition in a harness connectorfor' causing said drop device that is not supported by the warp threads to engage the teeth of the 'detectmg members and lock the detectorsifrom:

relative lengthwise movement. n

7 In a loom, the combination of a plurality of harness frames and harness connectors, detector members having relative movement transversely of the loom and provided with teeth, a series of drop -wires normally supported by the warp threads duringweaving and actingto engage betweenvthe teeth of the detecting members and lockthe detectors from relative transverse movement on the occurrence of a warp fault, a drop device normally supported frorn locking engagement with the teeth of the detectors until the occurrence of an abnormal condition in a harness connection, andv means for effecting loom stoppage when thefteeth of the them from relative' harness frames and detectors become engaged by either a drop wire or the drop device.

8. In a loom, the combination of a plurality of harness frames and harness connectors, detector members having relative movement transversely of the loom and p rcvided with teeth, yielding means for relatively moving the toothed detectors transversely of the loom, a series of drop wires normally supported by the warp threads ,during weaving and acting between the' teeth `of the detectors to lock the detectors from relative transverse movement on the occurrence of a Warp fault, a drop device separate from thel'ldrop wires and normally su "reported from ylocking engagement with t e teeth of the detectors untilthe occurrence of' an abnormal condition in a harness connection, and thereupon moved into enga ement with the detector teeth to lock the letector, and means for effecting loom stoppage when the 'relative transverse movement of the detectors is arrested by either a drop wire or the drop device engaging the teeth of the detectors. y 9

9. In a loom, the combination of shedding mechanism including harness frames and harness connectors, toothed detectors having relative movement transversely of the loom, means for stopping the loom when detectors are arrested in their relative movement, a detector stop device normally held out ot stopping relation with the toothed detecltors until the occurrence of Aan abnormal condition in one of the harness connectors, and means actuated by an abnormally. conditioned harnessl connector for causing the e detector vstop device to lock the toothed detectors from relative movement transversely of the loom. 105

l0. In a loom, the combination of shedding -mechanism including harness frames and harness connectors, a warp stop mechanism including, toothed detectors mounted for relative movement in a direction transllo versely ofthe loom, a series of drop Wires, means for stopping the loom when a detector is arrested in its relative movement transversely of the loom, a stop linger extending Itransversely. of the toothed detec- 115 tors, means normally acting to hold the stop `finger out, of engagement with the toothed detectors, and an actuator for the stop linger rendered operative by ia broken or too slack harness connectorv for moving the stop finger into engagement'with the toothed detectors to effect loom stoppage.`

llQIn a loom, thecombination of a plurality ofvharness frames and harness connectors,.a warp stop mechanism including a 125 toothed detector. mounted for movement transversely of the loom, means for moving Vthe, detector transversely of the loom, means `forstopping the loom when the transverse movement of the detector is arrested, 180

insges? a detector stop member supported to extend transversely of the detector, means normally acting to hold the stopl member from engagement with the teeth of the transversely movable detector, an actuator for the stop `member, connections between the stop lmember and actuator rendered effective to move the stop member into engagement with the teeth of the detector by an abnormal conmovable detectors, a stop finger supported i between the ends of the toothed-detectors in position to engage between the teeth of the fixed and movable detectors to arrest relative lengthwise movement' of the detectors, means acting on -the stop finger to normally retain the stop finger ont' of engagement -with the toothed detectors, and an actuator'connectedto the stop finger and extendingbeneath the harness connectors to be operated by any slack. harness connector to move the finger into engagement with the toothed detectors and stop the loom.

In testimony whereof, I have signed my name to this specification.

' GEORGE RHEAULT; It. 5.] 

